Detention (Blu-ray)

Set during the Taiwanese martial law of the 1960s, this shockingly gruesome and terrifying coming-of-age drama based on a hugely popular video game sees two classmates who go looking for their missing friends and teachers, all of whom took part in an illegal book club, only to come face to face with ghosts and deformed monsters that have taken over their school. This masterful debut from director and co-writer John Hsu recalls the best of Guillermo del Toro, with enough blood, striking sound design, art direction and special effects to evoke Silent Hill and other landmarks of the genre.